JPH05108871A - Character recognition device - Google Patents

Abstract

PURPOSE:To smoothly input a handwritten character in a natural shape by displaying inputted image as it is instead of displaying the character phont of a recognition result concerning a character of the high possibility of erroneous recognition. CONSTITUTION:Whether the recognition result is right or erroneous is judged at an erroneous recognition judging means 4. In the case of being judged to be erroneous recognition, the image of input character which is recognized to be erroneous recognition and stored in an input image buffer 2 is moved to an input image memory 6. A display control means 9 reads out a character code from a character code memory 5, reads out the character phont corresponding to the code and makes an output means 8 to display the result. Furthermore, the display control means 9 reads out the character image stored in the input image memory 6 in order of storing at the same place as the character judged to be erroneous by the erroneous recognition judging means 4 and display it on the output means 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a character recognizing device, and more particularly to a character recognizing device capable of smoothly inputting characters by handwriting without the operator being concerned about the recognition result of the characters. ..

[0002]

2. Description of the Related Art In a character recognition apparatus for inputting characters into a computer by performing character recognition, the recognition result of the input characters is displayed in a character font. However, with conventional character recognition technology, a sufficient character recognition rate cannot be obtained, so the operator always inputs characters while checking the character recognition results. I had no choice but to enter.

Techniques for solving the above problems (hereinafter, referred to as
Prior art 1) is disclosed in JP-A-62-127990. That is, in the related art 1, for a character whose character recognition result is likely to be erroneous recognition, the recognition result of the character is ☆ ,? Symbols such as “” are displayed, and correction of erroneous recognition is performed collectively afterwards, thus making it possible to smoothly input characters in a natural manner.

As another technique (hereinafter referred to as "conventional technique 2"), Japanese Laid-Open Patent Publication No. 2-224168 does not recognize any input characters and displays all the images as they are.
The aim is that the operator does not have to correct erroneous recognition.

[0005]

However, the above-mentioned conventional technique 1 has the following problems. Recognition result is ☆ ,? The operator feels uncomfortable because it is displayed with symbols such as. When correcting the misrecognition, as described above, since the location of the misrecognition is displayed by the symbol, the location of the misrecognition can be easily confirmed, but the misrecognized character, that is, the symbol. You need to remember and correct the letters you wanted to type. Therefore, if the input sentence is a long sentence or the erroneous recognition portions are lined up, it is difficult to correct the erroneous recognition. Therefore, after all, it is unavoidable to input characters while correcting misrecognition one by one. If you do not save the recognition result of the character after correcting all the misrecognized parts, it is more difficult to remember the character you wanted to input in the part displayed with the symbol when reusing the saved text. Becomes Therefore, from this point as well, it is unavoidable to input characters while correcting erroneous recognition one by one.

The above-mentioned conventional technique 2 has the following problems. All images are saved, so a large amount of memory is required. Since it is saved as an image, it does not have sufficient functions necessary for text processing, such as character search and replacement. Since the stored memory is not coded, it is not possible to directly use a sentence created by handwriting with another document processing software or the like. Since the input characters are not copied, they cannot be used as materials to be printed out and submitted to the outside, limiting their use. Therefore, an object of the present invention is to provide a character recognition device that allows an operator to smoothly input a character by handwriting without being concerned about the recognition result of the character.

[Means for Solving the Problems]

According to the present invention, input means for inputting characters by handwriting, an input image buffer for temporarily storing an image of the characters input by the input means, and input by the input means are provided. A character recognition means for recognizing the character, an erroneous recognition determination means for determining whether the recognition result by the character recognition means is correct, and a code of a character determined to be correct by the erroneous recognition determination means. A character code memory for storing a character code, an input image memory for storing a character determined to be an error by the error recognition determining means, a font file storing a character font, a character font and a character image are displayed. Output means for
A character font corresponding to the character code stored in the character code memory is read from the font file, displayed on the output unit, and is the same as the character determined to be erroneous by the erroneous recognition determination unit. It is characterized in that it comprises a display control means for reading out a character image stored in the input image memory and displaying it on the output means at a place.

As a result of various researches to solve the above-mentioned problems, the present invention, etc., shows that for characters that are highly likely to be misrecognized, instead of displaying the character font of the recognition result,
As shown in FIG. 1, it has been found that if the input image is displayed as it is, the operator can smoothly input characters by handwriting without worrying about the recognition result of the characters.

The present invention has been made based on the above findings. Next, one embodiment of the character recognition device of the present invention will be described with reference to the drawings. FIG. 2 is a block diagram showing an embodiment of the character recognition device of the present invention, and FIG. 3 is a flowchart for displaying an input character by the character recognition device of the present invention. In FIG.
Reference numeral 1 is input means such as a tablet for inputting characters by handwriting, 2 is an input image buffer for temporarily storing an image of characters input by the input means 1, and 3 is input by the input means 1. Is a character recognition means for recognizing the generated characters, and compares the standard pattern of handwritten characters registered in the recognition dictionary with the character pattern input by the input means 1 to calculate the similarity between them. Then, the character code of the standard pattern with the highest degree of similarity is sent as a recognition result to the erroneous recognition determination means, which will be described later.
As the measure of the similarity, the great value of the membership function, the distance between the patterns, the writing direction of the input character, or the like is used. A recognition dictionary is, for example, about 2000 kanji
A standard pattern of handwritten characters for characters is registered.

Numeral 4 is an erroneous recognition judging means for judging whether the recognition result by the character recognizing means 3 is correct or not,
The similarity calculated by the character recognition unit 3 is compared with a reference value. If the similarity is smaller than the reference value, the recognition result by the character recognition unit 3 is determined to be erroneous and will be described later. Send the judgment result to the input image memory. On the other hand, if the similarity is higher than the reference value, the recognition result by the character recognition unit 3 is determined to be correct, and will be described later.
Send the judgment result to the character code memory.

Reference numeral 5 is a character code memory for storing a code of a character judged to be correct by the misrecognition judging means 4, and 6 is an input for saving a character judged to be an error by the misrecognition judging means 4. The image memory, 7 is a font file in which coded character fonts are stored, and 8 is output means for displaying the character fonts and character images.

Reference numeral 9 denotes a display control means, which reads out a character font corresponding to the character code stored in the character code memory 5 from the font file 7 and causes the output means 8 to display it, and make a misrecognition judgment. The character images stored in the input image memory 6 are read in the order of storage at the same location as the character judged to be erroneous by the means 4 and displayed on the output means 8.

According to the character recognition device of the present invention configured as described above, a character image and a character font can be mixed and displayed as follows. The image of the handwritten character input by the input means 1 is temporarily stored in the input image buffer 2 and sent to the character recognition means 3, and the character recognition means 3 recognizes the input character. The recognition result by the character recognition means 3 is sent to the erroneous recognition determination means 4 and the erroneous recognition determination means 4
At, it is determined whether the recognition result is correct or incorrect. When the misrecognition determining means 4 determines that the character code is correct, the character code is stored in the character code memory 5. At this time, the image data of the input character determined to be correct stored in the input image buffer 2 is erased. It should be noted that it is more preferable to provide a means for making a misrecognition when it is judged to be correct against the intention of the operator.

On the other hand, when it is recognized as an erroneous recognition, the image of the input character recognized as the erroneous recognition, which is stored in the input image buffer 2, is moved to the input image memory 6. At this time, at the same time, incidental information such as the display position of the erroneously recognized character may be stored in the input image memory 6 or the information indicating that the input image memory 6 should be referenced may be coded and stored in the character code memory 5. May be. This code may be an appropriate code outside the upper and lower limits of the character code.

The display control means 9 reads the character code from the character code memory 5, then reads the character font corresponding to this code from the font file 7, and causes the output means 8 to display the result. Further, the display control means 9 reads the character images stored in the input image memory 6 in the order of storage at the same position as the character judged to be erroneous by the erroneous recognition judgment means 4, and causes the output means 8 to display the character images.

By thus displaying the image and the character font in a mixed manner, the following effects are brought about. The operator does not have to perform character input while checking the recognition result of the input character, and the operator does not feel uncomfortable in displaying the erroneous recognition. Since the image of the misrecognized character is displayed, the operator does not need to remember the input character when correcting the misrecognition. For this reason, it is possible to collectively correct erroneous recognition after inputting a sentence to some extent. Since the input sentence can be saved while the image and the character font are mixed, the operator can correct the misrecognition only when necessary.

[0017]

As described above, according to the present invention, since a character image and a character font can be displayed in a mixed manner, the operator does not care about the recognition result of the character and the handwritten character can be displayed. The useful effect is that the input of can be done smoothly in a natural way.

[Brief description of drawings]

FIG. 1 is a plan view showing a display example in which a character image and a character font are mixed.

FIG. 2 is a block diagram of a character recognition device of the present invention.

FIG. 3 is a flowchart for displaying an input character by the character recognition device of the present invention.

[Explanation of symbols]

 1: input means, 2: input image buffer, 3: character recognition means, 4: erroneous recognition means, 5: character code memory, 6: input image memory, 7: font file, 8: output means, 9: display control means ..

Claims (1)

[Claims] 1. An input unit for inputting characters by handwriting, an input image buffer for temporarily storing an image of the characters input by the input unit, and the characters input by the input unit. A character recognition means for recognizing the character, an erroneous recognition determining means for determining whether the recognition result by the character recognizing means is correct or not, and a code of the character determined to be correct by the erroneous recognition determining means. Character code memory for
An input image memory for storing a character judged to be erroneous by the erroneous recognition judging means, a font file in which a character font is stored, an output means for displaying a character font and a character image, and the character code. The character font corresponding to the character code stored in the memory is read from the font file,
Then, the character image stored in the input image memory is read at the same location as the character which is displayed on the output means and is judged to be erroneous by the erroneous recognition judging means, and is displayed on the output means. And a display control means for the character recognition device.